In every computation case, the steady calculation is performed for 12,000 s, and transient calculation is performed for 4000 s.
The steady calculation based on the mixing-plane method is still the most widely-used three-dimensional flow analysis tool for multistage turbomachines.
For this reason, the leading edge of the front quite closely tracks quasi-steady calculations, even in the lowest Damköhler number case, DaF∼0.005.
A statistical analysis of the results produced by this method is then presented, which compares the results to those of simple quasi-steady calculations.
If, however, the time period of the dynamic phenomenon is of the order of 1 s or more, then quasi-steady calculations are more than adequate, particularly at the higher vehicle speeds.
The results of the steady state calculations were compared with results obtained from conventional diffusion codes, while transient calculations were assessed using the point kinetic model of the RELAP5 code.
Results from the unsteady state were compared to the results of steady state calculations.
Systems for intermittent heating are often designed using rule of thumb estimates or inadequate steady state calculations.
The numerical results from both dynamic and steady state calculations demonstrate the accuracy and robustness of this approach.
